Brick



Petented Feiti., G

GENTAEG YUIVIBA. OF TOEYO-FU, JAPAN.

BRICK.

Application filed February 9, 1921. Serial No. 443530.

TO all nlwm it may concem:

Be it known that I, G'ENTARO YUMnA, a subject of the Empire of Japan, residing at No. 1599 Oi-Machi, Ebara-Gun, Tokyol u, Japan, have invented certain new and Useful Invention of Improvements in Briclrs, of which the followingis a Specification.

The present invention relates to improvements in bricks and has for its particular object to provide a relatvely light. durable and fire-proof brick.

More particularly the present invention resides in the provision of a brick Which composed of crushed grains or gravels ot liparite closely mixed With usual brick-earth or Clay, the material being moulded to any suitable form and bur-ned in a kiln in the usual manner.

Other Objects, as well as the nature, characteristic features and Scope of the inVention Willbe more readily apparent from the 'following description 'taken in connection With the accompanying drawings and pointed Out in the claim.

The in'vention is Clcarly illustrated in. the accompanying drawings in Which:

Figure l is a perspective view of one of the improved bricks.

Eig. 2 is a cross sectional detail thereoi.

llet'erring now, more particularly to 'the drawing, there is employed liparite Which is quartZ-like trachyte. This liparite is preterably in the :form ot' lava and rock and is secured from Nii-Jiina sland, ldzu, Japan, the same being a porous, relatively light and comparatively strong and fireproof rock. The rock is crushed into small. grains or gravels and in this particular instance possesses desirable qualities, that is, they are refractory and self-fiuxing so 'that when mixed With Ordinary brick-earth oi- Clay they are securely bound With the Clay.

l n :ferming the particular briclts indicated in the drawings subsequent to crushing the lipurite the crushed pieces are divided into two classes by a suitable shahing action, the coarser grains being of One-fourth to threesixteenths of an inch in diameter and the linely crushed pieces being one-sixteenth of an inch Or less in diameter. The partieles of the two classes are respect-ively mixed With Clay in suitable proportion 't'or instance, one part of liparite and three parts or Clay. The material is suitablv moistened With Water and hneaded in aiiv desirable nianner and afterwards moulded to form a bricln 'the inner part a of Which is made of :L material containing the coarsely crushen'l portions to provide for Strength While the outer part is made of the finely crushed liparite and Clay to obtain a smooth surface as shown in Figure 2. The briolrs are dried and hurned in a kiln in a suitahle manner known in the brick making art. If desirable line poWder of liparite produ ed While the rock is being Crushed may be added With either O the aioresaid materials in suitahle proportion. 1

i ilthough the bricks may be made in any shape, a desirable Sha pe is illustrated ih Figure l. Also as indicated in this (figure. the upper eurt'ace of the reCt-angular body of the briclr may be formed With long'itd dinal grooves to facilitate the anchoriiip' oi't' the mortar subsequent to the laying' otthe brick.

Briclte constructed according' to the present method being very .light and at the same time durable, lessen the Weight of buiidings and permit oi" other advantnges in architecture, especially in the construction of Walls archeeg, floors, etc., as by reducing' the dead Weight of brieks. Moreover, oix 'ing to their' fire-proot nature, the bricls are adapted for the construction of fire-Walls furnaces, etc.

.t is believed in view of the foregoing that further detail description of the invention is entirely unnecessary. Likewise, it is believed that the ad'vantages both from a constructional and commercial standpoint are appreciated.

.llaving thus fully described the invention What is claimed as new and desired to be secured by Letters-Patent is:

bricl: compoeed ot a n'iixture ot Crushed grains ot liparite and Clay.

In testimony Whereof T have afiiXed my signature.

GENTARO YUMURA. 

